I need to use a reed switch and a magnet on a shaft. When it get turned to a specific degree the magnet will trigger the reed switch. The shaft only turns one way and is turned by hand. The problem is the device could have a lot of vibrations; like falling to the ground or getting kicked and punched—kids involved :) Now if a really bad knock occurs I can live with some false positives but those will be deferred as best as possible.
How can I find the correct reed switch and magnet combination. How do I match these parameters up? I know I need to select the correct reed switch but what do I need to look for in terms of identifying the "stiffness"/"tension" of the plates? Then I can just buy magnets and test them by trial and error?